class_docstr: Abstract teacher that wraps around another teacher.
  
  This teacher allows for manipulating the fields returned by the inner teacher, in
  the abstract self._edit_action() method that is called during self.act(). The inner
  teacher must subclass FixedDialogTeacher in order to make use of that teacher's
  .get_orig_action() and .process_action() methods.
docstr: Reset metrics for the subtask.
docstr_tok: ["Reset","metrics","for","the","subtask","."]
code: def reset_metrics(self):
      """
      Reset metrics for the subtask.
      """
      self.task.reset_metrics()
  
imports: from typing import Optional
  from parlai.core.params import ParlaiParser
  import copy
  from abc import ABC
  from parlai.core.agents import create_agent_from_shared
  from parlai.core.message import Message
  from parlai.core.opt import Opt
  from parlai.core.teachers import create_task_agent_from_taskname, FixedDialogTeacher, Teacher
  from parlai.utils.misc import warn_once
label_desc: Use image node_id 11 for calling the AbstractWrapperTeacher obj's underlying member method code with example usage: obj.reset_metrics() without return types